摘要
基于稀磁铜铁合金低温热电偶4—273 K分度实验,对铜铁热电偶低温热电势进行理论分析,提出了有别于金铁低温热电势理论的铁磁性杂质之间相互作用对低温热电势影响的观点,并对提出的低温热电势理论分析计算进行了实验验证。研究结果表明铜铁热电偶不仅在液氦、液氢温区范围能代替贵金属金铁热电偶使用,特别在高温超导技术领域的温区中的应用更有优势,同时铜铁热电偶具有廉金属热电偶及偶丝机械强度远高于金铁等特征,廉金属低温稀磁铜铁合金热电偶,可以替代贵金属金铁热电偶,而具有广阔的应用前景。
Based on an calibration characteristics experimental investigation on dilute magnetic Cu-Fe alloy thermocouple at 4-273 K, theoretical analysis was proposed that both the magnetic impurity and their interaction should be considered when researching the low temperature thermoelectric power of Cu-Fe dilute magnetic alloy which has a high concentration of iron. This theory was different to that of Au-Fe thermocou- pie and had verified by experiments. The experimental results indicate that the NiCr-CuFe thermocouple can be used in the liquid helium temperature region as well as the Au-Fe thermocouple, and it is even more ad- vantageous in high temperature superconducting technology application. Cu-Fe alloy thermocouple is capable of replacing the precious metal AuFe alloy thermocouple due to its significant advantages in economy and mechanical strength, and has important research significance and promising applications.
出处
《低温工程》
CAS
CSCD
北大核心
2016年第6期1-4,共4页
Cryogenics
基金
国家自然科学基金资助项目(51276070)
关键词
低温测量
低温稀磁合金热偶
近藤效应
分度特性
low-temperature measurement
dilute magnetic alloy thermocouple at low temperature
Kon-do effect
calibration characteristics
